1 /* 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "assembler_x86.inline.hpp" 27 #include "runtime/icache.hpp" 28 29 #define __ _masm-> 30 31 void ICacheStubGenerator::generate_icache_flush(ICache::flush_icache_stub_t* flush_icache_stub) { 32 StubCodeMark mark(this, "ICache", "flush_icache_stub"); 33 34 address start = __ pc(); 35 #ifdef AMD64 36 37 const Register addr = c_rarg0; 38 const Register lines = c_rarg1; 39 const Register magic = c_rarg2; 40 41 Label flush_line, done; 42 43 __ testl(lines, lines); 44 __ jcc(Assembler::zero, done); 45 46 // Force ordering wrt cflush. 47 // Other fence and sync instructions won't do the job. 48 __ mfence(); 49 50 __ bind(flush_line); 51 __ clflush(Address(addr, 0)); 52 __ addptr(addr, ICache::line_size); 53 __ decrementl(lines); 54 __ jcc(Assembler::notZero, flush_line); 55 56 __ mfence(); 57 58 __ bind(done); 59 60 #else 61 const Address magic(rsp, 3*wordSize); 62 __ lock(); __ addl(Address(rsp, 0), 0); 63 #endif // AMD64 64 __ movptr(rax, magic); // Handshake with caller to make sure it happened! 65 __ ret(0); 66 67 // Must be set here so StubCodeMark destructor can call the flush stub. 68 *flush_icache_stub = (ICache::flush_icache_stub_t)start; 69 } 70 71 #undef __